APPARATUS AND METHODS FOR BIASING OF LOW NOISE AMPLIFIERS

• Main Authors: Nagarajan, Sachin, Song, Christopher, Choi, Yunyoung, Devaraj, Abhishekh, Thoomu, Kiran Tej, Balteanu, Florinel G, Liu, Wei
• Format: Patent
• Language: English
• Published: 26.01.2023
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; CONTROL OF AMPLIFICATION; ELECTRICITY

Apparatus and methods for biasing of low noise amplifiers (LNAs) are provided herein. In certain embodiments, an LNA includes at least one transistor that amplifies a radio frequency (RF) input signal, and a bias circuit including a current bias circuit that generates a bias current based on a reference current and a voltage bias circuit that generates at least one input bias voltage for the at least one transistor based on the bias current. The current bias circuit includes a first bias transistor that receives the reference current, a second bias transistor that generates the bias current, and an amplifier that controls a first bias voltage of the first bias transistor to match a second bias voltage of the second bias transistor.